Scarlett 2i4 is a 2 in / 4 out USB audio interface featuring two award-winning Focusrite pre-amps and four high-quality audio outputs. Housed in an anodised aluminium unibody chassis, the Scarlett 2i4 is the perfect audio interface for musicians and digital DJs.
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I use a UAD Apollo quad which allows me to use all UAD plug-ins without stressing my processor.